to rub the back of someone's neck really hard, when they have done or said something stupid. You must call "rub" before you can take action. If someone says "no-rub" before you say "rub" then you can't rub them.

Random Ugly Bitch. A game played by guys in which the whole group looks around a room, then stares at the RUB until they either blush or go away. IF she stays they walk over and say to her shes ugly;if she runs they yell it out. Either way its fun.